Few people were aware of the 1994 single “Insomniac” by the rock duo Billy Pilgrim, and it quickly sank into obscurity. But a cappella groups can’t stop singing it. We set out to find an explanation.

The original Vocal Point members pose for a picture. This group was the start of many years of Vocal Point to come which continue today. (Dave Boyce) The original Vocal Point group stands together.

Thanks in part to the warm reception of shows such as NBC's "The Sing-Off," movies such as "Pitch Perfect" and Grammy Award-winning group Pentatonix, a cappella music is experiencing a resurgence in ...

The song is called “I Hate A Cappella,” and the joke is that it was composed and performed by an a cappella group, The Richter Scales. The group, comprised largely of Ivy League tech workers in San ...